192 FAUNA OF NEW ENGLAND. 



Nautilm crista Linne, Syst. Nat., ed. 10, 1758, vol. 1, p. 709. 

 " IN Germaniae paludibus." 



Planorhis nautileus Gray, Turton's Manual Land and Fresh- 

 water Shells, 1857, p. 236, pi. 8, fig. 94. 



Me. — Barren Brook, Caribou (Nylander). 



*Segmentina armigera (Say). 



Gould, Inv. Mass., 1870, p. 499, figs. 749, 750. 

 Planorhis armigerus Say, Joum. Acad. Nat. Sci. Phila., 1821, 

 ser. 1, vol. 2, p. 164. " Upper Missouri." 



Me. — Bangor; Monmouth; North Warren. 



Vt. — Burlington; Chimney Point. 



Mass. — Auburndale; Cohasset; Revere ; \ Andover. 



R. I.— Tiverton. 



Segmentina jenksii (H. F. Carpenter). 



Davis, The Apteryx, 1905, vol. 1, p. 117, pi. 9, figs. A. B. 



Planorhis jenksii Carpenter, Central Falls Visitor, March 2, 

 1871; Conch. Exch., 1887, vol. 2, p. 2. "near Hammond's 

 Pond, Pawtucket, R. I." 



R. I. — Near Hammond's Pond, Pawtucket. 



ANCYLIDAE. 



*Ancylus fuscus C. B. Adams. 



Adams, Boston Journ. Nat. Hist., 1840, vol. 3, p. 329, pi. 3, 

 fig. 17. " Andover * * * Mansfield, [Mass.]." Walker, Nauti- 

 lus, 1903, vol. 17, p. 15, pi. 1, figs. 1-9. 



Mass. — Fresh Pond, Cambridge; Winchester. 

 Conn. — Near New Haven. 



*Ancylus rivularis Say. 



Say, Journ. Acad. Nat. Sci. Phila., 1817, ser. 1, vol. 1, p. 125. 

 [United States.] Walker, Nautilus, 1904, vol. 18, pp. 16, 25, 

 pi. 1, figs. 1-10, 13-15. 



